scholarly journals Numerical simulation of 4-turns nitrogen pulsating heat pipe

Author(s):  
M.N. Li ◽  
Z.X. Wu ◽  
D. Xu ◽  
L.F. Li
2018 ◽  
Author(s):  
Durga Bastakoti ◽  
Hongna Zhang ◽  
Wei-Hua Cai ◽  
Feng-Chen Li

Author(s):  
Jian-Hong Liu ◽  
Fu-Min Shang ◽  
Nikolay Efimov

Abstract Numerical simulation was performed to establishing a two-dimensional pulsating heat pipe model, to investigate the flow and heat transfer characteristics in the pulsating heat pipe by using the Mixture and Euler models, which were unsteady models of vapor-liquid two-phase, based on the control-volume numerical procedure utilizing the semi-implicit method. Through comparing and analyzing the volume fraction and velocity magnitude of gas phase to decide which model was more suitable for numerical simulation of the pulsating heat pipe in heat and mass transfer research. It was showed there had gas phase forming in stable circulation flow in the heating section, the adiabatic section using the Mixture and Euler models respectively, and they were all in a fluctuating state at 10s, besides, the pulsating heat pipe had been starting up at 1s and stabilizing at 5s, it was all found that small bubbles in the heat pipe coalescing into large bubbles and gradually forming into liquid plugs and gas columns from the contours of volume fraction of the gas phase; through comparing the contours of gas phase velocity, it could be seen that there had further stably oscillating flow and relatively stabler gas-liquid two-phase running speed in the pulsating heat pipe used the Mixture model, the result was consistent with the conclusion of the paper[11] extremely, from this it could conclude that the Mixture model could be better simulate the vaporization-condensation process in the pulsating heat pipe, which could provide an effective theoretical support for further understanding and studying the phase change heat and mass transfer mechanism of the pulsating heat pipe.


Author(s):  
Dongwei Zhang ◽  
Erhui Jiang ◽  
Chao Shen ◽  
Junjie Zhou ◽  
Zhuantao He

Author(s):  
Hossein Alizadeh ◽  
Roghayeh Ghasempour ◽  
Mohammad Behshad Shafii ◽  
Mohammad Hossein Ahmadi ◽  
Wei-Mon Yan ◽  
...  

2020 ◽  
Vol 165 ◽  
pp. 01031
Author(s):  
Jian-Hong Liu ◽  
Fu-Min Shang ◽  
Wei Qiao

Based on Mixture and Euler model, numerical simulation was used to study the flow and heat transfer in pulsating heat pipe by unsteady method. By comparing the gas volume fraction and gas velocity by different models at different time, the results showed that both models could simulate the evaporation and condensation process of the working fluid, and the liquid plug and gas plug were formed in the tube. By comparing the gas volume fraction and gas velocity at 5s and 10s, it was indicated that the fluid dynamics and heat transfer were more violent by Mixture model in the tube.


Author(s):  
Bhawna Verma ◽  
V. L. Yadav ◽  
K. K. Srivastava

2013 ◽  
Vol 44 (1) ◽  
pp. 1-30 ◽  
Author(s):  
Sejung Kim ◽  
Yuwen Zhang ◽  
Jongwook Choi

Author(s):  
Mauro Mameli ◽  
Miriam Manzoni ◽  
Lucio Araneo ◽  
Sauro Filippeschi ◽  
Marco Marengo

Sign in / Sign up

Export Citation Format

Share Document